I see all kinds of chemicals being used and many of them are hazardous, I have also noted that most of the time the product does not actually remove the rust with out loads of scrubbing or sanding. To make a long story short I been talking to my Axe buddys and they collect old axes these axes are civil war era and have been in the ground for many years and when they dig one up you can hardly tell what it is. I saw a before and after photo of an axe head and I was so impressed I had to ask how he did it. he said Molasses and vinegar and then instructed me to watch this video
I have not tried this yet but have got some advice on it....The molasses and or vinegar alone won't do it. Its the chemical created in the fermentation process that attacks the rust, so if your in a hurry this will not work. My guy says 2-3 weeks of soaking is required and that you better like the smell of death , but says he will not do it any other way because the rust just wipes away when using this method correctly.